package com.sky.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.sky.constant.MessageConstant;
import com.sky.constant.StatusConstant;
import com.sky.dto.SetmealDTO;
import com.sky.dto.SetmealPageQueryDTO;
import com.sky.entity.Dish;
import com.sky.entity.Setmeal;
import com.sky.entity.SetmealDish;
import com.sky.exception.DeletionNotAllowedException;
import com.sky.mapper.DishMapper;
import com.sky.mapper.SetmealDishMapper;
import com.sky.mapper.SetmealMapper;
import com.sky.result.PageResult;
import com.sky.service.SetmealService;
import com.sky.vo.DishItemVO;
import com.sky.vo.SetmealVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

import java.util.ArrayList;
import java.util.List;

@Service
public class SetmealServiceImpl implements SetmealService {

    @Autowired
    private SetmealMapper setmealMapper;

    @Autowired
    private SetmealDishMapper setmealDishMapper;

    @Autowired
    private DishMapper dishMapper;

    /**
     * 新增套餐同时保存套餐菜品数据
     *
     * @param setmealDTO
     */
    @Transactional
    public void saveWithDish(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //新增套餐表数据
        setmealMapper.save(setmeal);

        //新增套餐菜品表数据
        Long setmealId = setmeal.getId();

        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        if (setmealDishes != null && setmealDishes.size() > 0) {
            setmealDishes.forEach(setmealDish -> {
                setmealDish.setSetmealId(setmealId);
            });
        }

        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 套餐分页查询
     *
     * @param setmealPageQueryDTO
     * @return
     */
    public PageResult pageQuery(SetmealPageQueryDTO setmealPageQueryDTO) {
        PageHelper.startPage(setmealPageQueryDTO.getPage(), setmealPageQueryDTO.getPageSize());
        Page<Setmeal> page = setmealMapper.pageQuery(setmealPageQueryDTO);
        return new PageResult(page.getTotal(), page.getResult());
    }

    /**
     * 套餐批量删除
     *
     * @param ids
     */
    @Transactional
    public void deleteBatch(List<Long> ids) {
        //判断当前套餐是否能够删除--是否起售？？
        for (Long id : ids) {
            Setmeal setmeal = setmealMapper.getById(id);
            if (setmeal.getStatus() == StatusConstant.ENABLE) {
                //套餐起售中，不能删除
                throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ON_SALE);
            }
        }

        //套餐批量删除
        setmealMapper.deleteByIds(ids);
        //批量删除套餐关联套餐菜品的数据
        setmealDishMapper.deleteBySetmealId(ids);
    }

    /**
     * 根据id查询套餐以及套餐内菜品
     *
     * @param id
     * @return
     */
    public SetmealVO getByIdWithSetmealDish(Long id) {
        //根据id查询套餐
        Setmeal setmeal = setmealMapper.getById(id);

        //根据套餐id查询套餐菜品表
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);

        SetmealVO setmealVO = new SetmealVO();
        BeanUtils.copyProperties(setmeal, setmealVO);
        setmealVO.setSetmealDishes(setmealDishes);

        return setmealVO;
    }

    /**
     * 修改套餐
     *
     * @param setmealDTO
     */
    @Transactional
    public void update(SetmealDTO setmealDTO) {
        Setmeal setmeal = new Setmeal();
        BeanUtils.copyProperties(setmealDTO, setmeal);

        //1/修改套餐
        setmealMapper.update(setmeal);

        List<Long> setmealId = new ArrayList<>();
        setmealId.add(setmeal.getId());

        //2.删除套餐菜品表相关数据
        setmealDishMapper.deleteBySetmealId(setmealId);

        //3.插入套餐菜品表数据
        List<SetmealDish> setmealDishes = setmealDTO.getSetmealDishes();
        setmealDishes.forEach(setmealDish -> {
            setmealDish.setSetmealId(setmeal.getId());
        });
        setmealDishMapper.insertBatch(setmealDishes);
    }

    /**
     * 启售停售套餐
     *
     * @param status
     * @param id
     */
    public void startOrStop(Integer status, Long id) {
        //起售套餐时，判断套餐内是否有停售菜品。若有，则无法启售
        List<SetmealDish> setmealDishes = setmealDishMapper.getBySetmealId(id);
        if (setmealDishes != null && setmealDishes.size() > 0) {
            for (SetmealDish setmealDish : setmealDishes) {
                Long dishId = setmealDish.getDishId();
                Dish dish = dishMapper.getById(dishId);
                if (dish.getStatus() == StatusConstant.DISABLE) {
                    throw new DeletionNotAllowedException(MessageConstant.SETMEAL_ENABLE_FAILED);
                }
            }
        }

        Setmeal setmeal = Setmeal.builder()
                .id(id)
                .status(status)
                .build();
        setmealMapper.update(setmeal);
    }

    /**
     * 条件查询
     * @param setmeal
     * @return
     */
    public List<Setmeal> list(Setmeal setmeal) {
        List<Setmeal> list = setmealMapper.list(setmeal);
        return list;
    }

    /**
     * 根据id查询菜品选项
     * @param id
     * @return
     */
    public List<DishItemVO> getDishItemById(Long id) {
        return setmealMapper.getDishItemBySetmealId(id);
    }
}
